diff --git a/bot.go b/bot.go
index 41e9b27..030612f 100644
--- a/bot.go
+++ b/bot.go
@@ -739,6 +739,9 @@ func (bot *BotAPI) RestrictChatMember(config RestrictChatMemberConfig) (APIRespo
 	if &config.CanAddWebPagePreviews != nil {
 		v.Add("can_add_web_page_previews", strconv.FormatBool(*config.CanAddWebPagePreviews))
 	}
+	if config.UntilDate != 0 {
+		v.Add("until_date", strconv.FormatInt(config.UntilDate, 10))
+	}
 
 	bot.debugLog("restrictChatMember", v, nil)
 
diff --git a/types.go b/types.go
index 91875bb..bef68b8 100644
--- a/types.go
+++ b/types.go
@@ -56,6 +56,7 @@ type User struct {
 	LastName     string `json:"last_name"`     // optional
 	UserName     string `json:"username"`      // optional
 	LanguageCode string `json:"language_code"` // optional
+	IsBot        bool   `json:"is_bot"`        // optional
 }
 
 // String displays a simple text version of a user.
diff --git a/types_test.go b/types_test.go
index 9ef03b1..62089c4 100644
--- a/types_test.go
+++ b/types_test.go
@@ -8,7 +8,7 @@ import (
 )
 
 func TestUserStringWith(t *testing.T) {
-	user := tgbotapi.User{0, "Test", "Test", "", "en"}
+	user := tgbotapi.User{0, "Test", "Test", "", "en", false}
 
 	if user.String() != "Test Test" {
 		t.Fail()